Solar module prices in 2025 have stabilized after years of dramatic fluctuations, with global wholesale prices ranging from $0. 28 per watt depending on technology, origin, and regional market conditions. Data source: IRENA (2025); Nemet (2009); Farmer and Lafond (2016) – Learn more about this data Note: Costs are expressed in constant 2024 US$ per watt. TOPCon Technology Dominance: TOPCon modules have. Most homeowners spend between $12,600 and $33,376 to install a complete residential solar system in 2026, with the national average at $19,873 before incentives. Your actual cost depends on your home's energy needs, roof characteristics, location and other factors, all of which we'll break down in. Solar panels cost $0. A typical 250 watt panel costs $175 to $375 on average. For an entire solar system, the average homeowner pays $3,910 to $6,490. Prices for Chinese project will be prices for TOPCon modules instead of PERC from April 2024 onwards. NLR's PV cost benchmarking work uses a bottom-up.